COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

Mechanical efficiency

Compressor efficiency

Volumetric efficiency

Isothermal efficiency

None of the listed here

Low frontal area

High pressure rise

Higher thrust

Increasing speed of incoming air

Compression of inlet air

Lost work

Reduction of speed of incoming air and conversion of part of it into pressure energy

High thermal efficiency

Reduction in compressor work

Decrease of heat loss in exhaust

Maximum work output

Lower at low speed

Higher at high speed

Higher at high altitudes

Same at all altitudes

Passing air and a large amount of steam over waste coal at about 65°C

Carbonisation of coal

Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast

Passing steam over incandescent coke

m³/min

kg/m³

kg/m²

m³/kg

From coal yard side

From an air conditioned room maintained at 20°C

From a side where cooling tower is located nearby

From outside atmosphere at 1°C

Compressed air at delivery pressure

Compressed air

Standard air

Free air

1

1.2

1.4

1.3